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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Related Experiment Video

Updated: Aug 26, 2025

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Corneal imaging with blue-light optical coherence microscopy.

Shanjida Khan1,2, Kai Neuhaus1, Omkar Thaware1,2

  • 1Casey Eye Institute, Oregon Health & Science University, Portland, OR 97239, USA.

Biomedical Optics Express
|October 3, 2022
PubMed
Summary
This summary is machine-generated.

A new blue-light optical coherence microscopy (OCM) system offers low-cost, high-resolution corneal imaging. This technology visualizes cellular structures, aiding in diagnosing eye diseases.

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Area of Science:

  • Ophthalmology
  • Biomedical Optics
  • Medical Imaging

Background:

  • Corneal imaging is crucial for diagnosing and treating various eye conditions.
  • Optical coherence tomography (OCT) is a standard non-invasive, high-resolution ocular imaging technique.
  • Optical coherence microscopy (OCM), a variant of OCT, provides cellular-level corneal visualization.

Purpose of the Study:

  • To demonstrate a low-cost, reproducible blue-light OCM system for detailed corneal cellular imaging.
  • To evaluate the system's capability in visualizing specific corneal structures.

Main Methods:

  • Development of a blue-light optical coherence microscopy system.
  • Utilizing the system to image corneal cellular structures, including epithelial cells, endothelial cells, keratocytes, and collagen bundles.
  • Characterizing the system's axial and lateral resolution and imaging depth.

Main Results:

  • The blue-light OCM system successfully visualized key corneal cellular components.
  • Achieved an axial resolution of 12 µm within tissue over a 1.2 mm imaging depth.
  • Obtained a lateral resolution of 1.6 µm across a 750 µm × 750 µm field of view.

Conclusions:

  • Blue-light OCM presents a cost-effective and accessible method for high-resolution corneal imaging.
  • This technique has significant potential for clinical applications in diagnosing and managing corneal diseases.